#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
//int main()
//{
//	printf("%zd\n", sizeof(char));
//	printf("%zd", sizeof(int));
//	return 0;
//}
fun()
{
	static int count = 1;
	return ++count;
}
int main()
{
	int a = 0;
	int c = fun() * fun();
	int b = fun();
	
	a = b - c;
	printf("%d", a);
	return 0;
}